#include <iostream>

#include "swap.h"

using namespace std;

int main() {
    int a = 10;
    int b = 20;

    cout << "Before swap: a = " << a << ", b = " << b << endl;
    swap(a, b);
    cout << "After swap: a = " << a << ", b = " << b << endl;

    return 0;
}